A material response solver that predicts the response of charring ablative materials under different degrees of physical modeling complexity is developed. The solver provides a versatile environment for engineering analyses and incorporates a third-party library for the evaluation of thermodynamic/transport properties of pyrolysis gas mixture and chemical kinetics, if necessary. Thermal nonequilibrium between the solid and the gas phases is considered using the two-equation model. A novel reactor network approach is used for modeling pyrolysis gas flow inside the porous ablative material, allowing simulations with various gas compositions and reaction mechanisms. Effects of chemical and thermal nonequilibrium and influences of the porosity and permeability of the porous structure on the response of charring ablative materials are explored. It is observed that higher porosity and smaller permeability values induce local thermal equilibrium, and chemical reactions increase the temperature differences between the phases.

开发了一种材料响应求解器，可以预测不同程度的物理建模复杂性下烧蚀烧蚀材料的响应。该求解器为工程分析提供了多功能环境，并结合了第三方库，用于评估热解气体混合物的热力学/传输特性和化学动力学（如有必要）。使用二方程模型考虑固相和气相之间的热不平衡。一种新颖的反应器网络方法用于模拟多孔烧蚀材料内部的热解气流，从而可以模拟各种气体成分和反应机制。探讨了化学和热非平衡的影响以及多孔结构的孔隙率和渗透率对烧蚀材料炭化响应的影响。据观察，较高的孔隙率和较小的渗透率值会引起局部热平衡，并且化学反应会增加相之间的温差。